Oh, yeah, exactly because of what we're talking about. Because there's more to him than just that. There would be no point to bring him back if the entirety of his character was just what people describe him as: a boring evil bad villain who just wants to kill people and its boring and not interesting and boring and evil and boring and... You get it.
There is more to his character, and I think he just tipped his toe into it at the final moments of Endwalker, despite being around since SB. Just like there was more to Garlemald and Ascians, despite them being around since 1.0, lol.
FFXIV characters and events are always under a slow cooking process to bring out the flavor in them.
Meteion was a special case because they wanted to end everything in one single expansion, so she got one single, very hurried arc, that was shared with introducing us to Elpis. But she deserved more, in my opinion.
Whoever says "I want new things", still doesn't understand FFXIV. We can have Meracydia, for example, but with it, we'll get story arcs for allagan people as well, who have been mentioned countless times, but always out of context. Every expansion is always new things, but with old things receiving context through it.